I don't know when__back to Beijing.When__,I'll call you.A.going;a_英语解答

I don't know when__back to Beijing.When__,I'll call you.
A.going;arriving B.to ;go C.going ;to arrive D.to go ;to arriving

人气：267 ℃　时间：2020-03-15 11:12:43

解答

D.你是否把答案写错了
前面是宾语.后面是时间状语.应该是 to go / arriving